The processor used makes no difference. The metamodel classes they generate are identical, except the hibernate processor doesn't add a @Generated annotation to the class. Dali still doesn't overwrite it.
> From: [email protected] > Date: Tue, 20 Dec 2011 15:24:47 +0100 > To: [email protected] > Subject: Re: [m2e-users] Annotation processing in Eclipse > > Alternatively you can use hibernate jpa annotation processor which does not > do this step - for what it is worth. > > /max > > On Dec 20, 2011, at 02:11, Anthony Fryer wrote: > > > I've got this working by doing as Max mentioned and manually add the JPA > > facet to the project after getting m2e to generate your project files, then > > commit the eclipse .settings file. > > > > There's other things to be aware of. You need eclipse and maven to > > generate the metamodel sources in the same directory or else you'll get > > compile errors. Here's a fragment from my pom.xml where I configure the > > metamodel generation, including the folder where the source files are > > generated... > > > > <plugin> > > <artifactId>maven-compiler-plugin</artifactId> > > <version>2.3.2</version> > > <configuration> > > <source>1.6</source> > > <target>1.6</target> > > <compilerArgument>-proc:none</compilerArgument> > > </configuration> > > </plugin> > > > > <plugin> > > <groupId>org.codehaus.mojo</groupId> > > <artifactId>build-helper-maven-plugin</artifactId> > > <version>1.7</version> > > <executions> > > <execution> > > <id>add-source</id> > > <phase>generate-sources</phase> > > <goals> > > <goal>add-source</goal> > > </goals> > > <configuration> > > <sources> > > <source>src/main/jpa-metamodel-generated</source> > > </sources> > > </configuration> > > </execution> > > </executions> > > </plugin> > > > > <plugin> > > <groupId>org.bsc.maven</groupId> > > <artifactId>maven-processor-plugin</artifactId> > > <version>2.0.4</version> > > <executions> > > <execution> > > <id>process</id> > > <goals> > > <goal>process</goal> > > </goals> > > <phase>generate-sources</phase> > > <configuration> > > > > <compilerArguments>-Aopenjpa.metamodel=true</compilerArguments> > > <processors> > > > > <processor>org.apache.openjpa.persistence.meta.AnnotationProcessor6</processor> > > </processors> > > > > <outputDirectory>src/main/jpa-metamodel-generated</outputDirectory> > > </configuration> > > </execution> > > </executions> > > </plugin> > > > > Then in my eclipse project, I click on properties->JPA and configure the > > Canonical metamnodel source folder to be the same as specified in my > > pom.xml (ie. src/main/jpa-metamodel-generated) > > > > The other thing to be aware of, is when you do a build using maven, it will > > use a different annotation processor to generate the metamodel classes than > > eclipse uses. Eclipse uses Dali to generate these classes and Dali won't > > overwrite metamodel classes generated by a different annotation processor. > > It looks at the value of the @Generated annotation on the metamodel class > > and if its not "Dali" it won't overwrite it. > > > > This means if you do a maven build on your project and then go back to > > eclipse and start modifying your entity classes, the metamodel classes > > won't automatically update unless you delete them and let eclipse > > regenerate them, which it does immediately. From then on, eclipse will > > automatically update the metamodel classes as you modify the entity > > classes, until you do the next 'mvn clean install'. > > > > I think the Dali guys are going to provide a configuration option to allow > > you to specify Dali should overwrite these files. > > Seehttp://www.eclipse.org/forums/index.php/t/236558/ > > > > Cheers, > > > > Anthony > > > > > > > From: [email protected] > > > Date: Thu, 15 Dec 2011 16:15:02 +0100 > > > To: [email protected] > > > Subject: Re: [m2e-users] Annotation processing in Eclipse > > > > > > We got it compiled and working but also haven't been able to reach the > > > contributor to be able to release it :( > > > > > > If anyone know [email protected] let him know he got emails > > > awaiting ;) > > > > > > p.s. the workaround is to setup the annotation processor manually and > > > commit the .settings files > > > and it will work since m2e currently does not touch these settings. > > > > > > /max > > > > > > On Dec 15, 2011, at 12:17, Igor Fedorenko wrote: > > > > > > > Somebody provided a patch [1], but I could not get the patch working > > > > cleanly in my environment and there was no response from the developer > > > > > > > > [1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=335036 > > > > > > > > -- > > > > Regards, > > > > Igor > > > > > > > > On 11-12-15 2:13 AM, Ittai Zeidman wrote: > > > >> Hi, > > > >> I'm using m2e 1.0.100 and Eclipse (Indigo SR1). > > > >> I'd like to know how I can get m2e to change my project configuration > > > >> so > > > >> that it uses "Annotation processing" when it compiles my code. > > > >> The reason for this need is that I want to use the JPA feature of the > > > >> canonical metamodel, which builds on annotation processing. > > > >> I followed this hibernate tutorial > > > >> <http://docs.jboss.org/hibernate/stable/jpamodelgen/reference/en-US/html_single/> > > > >> and got maven itself to generate the required additional files without > > > >> a > > > >> problem but because Eclipse has no knowledge of these files, they are > > > >> only in the target folder, then I cannot use them while working. > > > >> Is there a way m2e can update the project configuration with respect to > > > >> this aspect? > > > >> > > > >> Thanks in advance. > > > >> > > > >> -- > > > >> Ittai Zeidman > > > >> VP R&D, Fashion Traffic <http://fashiontraffic.com/> > > > >> Follow us on: Twitter <http://twitter.com/fashiontraffic>| Facebook > > > >> <http://www.facebook.com/newfashiontraffic>| Tumblr > > > >> <http://fashiontrafficblog.tumblr.com/> > > > >> > > > >> > > > >> > > > >> _______________________________________________ > > > >> m2e-users mailing list > > > >> [email protected] > > > >> https://dev.eclipse.org/mailman/listinfo/m2e-users > > > > _______________________________________________ > > > > m2e-users mailing list > > > > [email protected] > > > > https://dev.eclipse.org/mailman/listinfo/m2e-users > > > > > > /max > > > http://about.me/maxandersen > > > > > > > > > > > > _______________________________________________ > > > m2e-users mailing list > > > [email protected] > > > https://dev.eclipse.org/mailman/listinfo/m2e-users > > _______________________________________________ > > m2e-users mailing list > > [email protected] > > https://dev.eclipse.org/mailman/listinfo/m2e-users > > /max > http://about.me/maxandersen > > > > _______________________________________________ > m2e-users mailing list > [email protected] > https://dev.eclipse.org/mailman/listinfo/m2e-users
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